Pressure reducing and regulating valve.



A. W. CASH.

PRESSURE REDUCING AND REGULATING VALVE.

APPLlcmoN mw JULY 13. |915.

Patented Apr. 18, 1916.

K I 1 l/l/ llllmmmmm FFICE.

ARTHUR Vl. CASH, GF DEGATUR, ILLINOIS.

PRESSURE REDUCNG AND REGULATNG VALVE.

Specification ei Letters Patent.

Patented Apr. 18, 1916.

Application filed July 13. 1915. Serial No. 39,703.

VBe it linou'n thut li Xirrurn lll. l citi/:on ot the limited Suites; residhg L,t Decatur. in the county of Blouson und Stu e ot' Illinois. have invented certain new und useful Improvements 1 Pressure Reducing and Regulating Valves. es shown und forth in the drurrings und specification mr nexed hereto.

My invention reluies to iinpwueinents in thut Oluss oi pressure refluringr und refrulntf inf); vulves commonly usd ilu Centros, und regulate the pressure of *fluids ilou" through pipes or conduits. und more especially to Class of imulstiug valves commonlv known :is uns oper which the eXeoss prof-sur f of the rulfe is utied und close, the re.. r relation to port, or open partition. or well. u iol: und outlet sir or rimini hotly proper, hre-ugh u'h i port the duid is unused to flou'. ln inuueroue other con; struotions of rallyes for t purpose heretotorf` nnidru the reducen and reguiaterl delivery pressurey is controlled by sume torni of diuphmgm. or un efr 'nient piston, against one side oit' which the reduced delivery pressure nets, while this delivery pressure Counter-netted on the opposite side of the piston or diaphragm, by un adjustable spring or weighted nieu is, the desired degree of delivery f nessure being obtained by adjustment of the spring` or weighted means, this diaphragm, or its piston equivun lent, efmtrolling the nmiu valve disk and port through some form of meelmuieui conV neotion, or Contact between the diaphragm or piston. und the main vulve disk,

ln un auxiliary operated vulve oi' the type here shown. unile a diaphragm and an opposing spring.,T are also used. the diaphragm is not in merhnnieul Connection to the main vulve disk; therefore. the reduced delivery pressure noting against the diziplirriguiv` Cannot control or operate the main vulve disk, .except through the medium of :i porv or disli i dividing the inlet the Valve sepuri'i..

` tion of the fluid being controlled by a small Figure l is a vertical central section in the direction of the main iuid ioW. Fig.

2 is n vertical section of a portion of the main body on the line A-B taken at right angle to the section shown in Fig. 1, Fig. 3 is a top plan view. Fig. 4 is'a plan vieu1 of e. lint sheet metal spring normally seating the secondary, or auxiliary valve.

flimilnr reference numerals refer to Similar parts throughout the several views and figures.

The mein body easing, 1, es Well as the top diaphragm and spring chamber casing Q. nre ,ne'fersbly made of some strong, inexpensive material such as ordinary Cast iron, which however, would not be suitable for 'the seating` portion, and other interior rating ports subjected to the oorroding :Lotion of inrious fluids. aswell as the erodselon o? the saine iuids passing ihr gli the seat and ports at the necessary high yelooities to obtain required reductions in pressure. The piston cylinder 3, with its sefsting portion 4, and the secondary, or auxiliary valve 5, being subject to rapid erosion owing to the very high velocities under which they are frequently required to operate, :rre therefore, preferably made 'of a higher grade, und more expensive material. and as they oftener require renewal, it is desirable that they he capable of being lquickly replaced as well as having the least amount of expensive material. which purposes ure accomplished by the construction shown. The main seat disk 6, and the secondary or auxiliary seat disk 7 are preferably inside of some semi-hard, yielding fibrous. material t0 insure shutting tightly on `furious kinds of fluid, and :1s they are subjected to the greatest amount of Wear, they niust also be made in such manner as to he quickly, and inexpensively replaced when worn.

'The Cylinder cap, 8,hi1s an annular recess on its under side into which the auxiliary seat disk 7 is tightly pressed, and is also provided with a central circular hub, 13, on its upper side which has a central bore to receive, and to guide the stein of auxiliary valve 5, the top of the central hub 13, also serving :as a limit stop for the diaphragm 9, which diaphragm, is preferably composed of one, or a plurality. of thin resilient metal sheets of eircular form. The piston cylinder cup, 8, is provided with a circular rim on its lower side, screw threaded,to receive the top portion of piston cylinderi, the circular shaped thin metal spring, 10, with its inwardly projecting blades is held in place between the upper end of cylinder 3, and cylinder cap 8, this spring serving to normally hold the auxiliary valve 5, in a closed position against the seat disk 7, as long as the diaphragm 9, is heldin its uppermost position by the action of the reduced fluid pressure against the underside of the diaphragm. The spring 11, acting throu h the pressure plate 12, on upper side o diaphragm 9, tends to force the diaphragm downward toward the limit stop on the central hub 13, of cylinder cap 8,`whenever the reduced delivery pressure is insufficient, or below the predetermined point for which the spring 11, has been adjusted by means of adjusting screw 14. Diaphragm 9, is held between the screw threaded portion of body casing l, and spring chamber easing 2, and is. lnade fluid tight on its under side by the soft gasket 15. The under side of diaphragm 9, always being in Contact with the upper end of stem on auxiliary valve 5, forces the latter down and opens the valve seat whenever the reduced delivery pressure below the pre-determined point for which spring 11, has been adjusted. By means of the hexagon portionl, of spring chamber casing 2, the latter is forced down tightly on diaphragm 9, and soft gasket 15, which action also holds the outer circular flange 17, of cylinder cap 8, tightly in positionagainst annular shoulder 18, of body casing 1, while cylindei1 cap 8, through piston cylinder 3, holds the lower end of the latter in fluid tight position against the gasket ring 19,A

- which rests in an annular groove around main valve port 20, in division wall 21, between the inlet, and outlet chamber portions of main body casing 1. Gasket ring 19, is made of any suitable soft or yielding material and of suitable thickness to make an impervious joint between division wall 21,

and lower kportion of piston cylinder 3.

`Lock nut 22, is provided to prevent adjusta lower guide flange 27, and upper guide flange 2S. On top side of the guide flange 28. a piston cup 40, of soft rubber, or other suitable material is provided and held in position over the upper end of bolt 26, by a screw threaded nut 29, which nut is prevented from loosening or backing olf' by means'of'the pin 30. The bolt 26, has a large hole 31, passing up through its center lto' within a shortdistanee from its upper 'A '.end, at which point a smaller hole 32, is pro- `vided for the passage of the high pressure from the inlet side of the valve, into the upper piston chamber above the soft piston cup.'

Just above thel auxiliary valve 5, and surrounding it inside of the seat disk 7, is an annular chamber 33, from which a number of ports 34-34, communicate with the larger anl nular chamber 35,in the up er side of cylinder cap 8, and from the cham er 35, another'set of port holes 36-36, communicate with the annular space37, around the piston cylinder 3, inside of the upper part of main body casing 1, and additional ports, or grooves 38-38, in the lower part of annular space 37, communicate with the reduced and delivery pressure chamber 39, on the outlet end ofthe valve. The combined area of openings in the plurality of ports 34-34, and also the areasv of ports'36-36, as well asthe areas of ports, or grooves 38-38, are each very much greater that the area of restricted port 32, and also somewhat larger that the area of opening between the auxiliary valve 5, and its seat disk 7, all for the purpose of permitting the high pressure fluid flowing up through the large port, or hole 31, and the restricted port, or hole 32, to escape through ports 34--34, 36-36, and 38-38, much faster than the fluid can be supplied through restricted port 32, so that whenever auxiliary valve 5, is in its open position, the fluid pressure above the soft piston cup 40, and inside of the piston cylinder 3, will either be the same as the reduced and regulated pressure in chamber 39, on the outlet end D,.of the regulator, or at some point intermediate of the reduced and regulated pressure, and the initial or high pressure on the inlet end C. of the regulator.

The operation of the valve is as follows: The amount of compression on spring, 11, having been adjusted in accordance with the pre-determined amount of delivery pressure. the diaphragm 9, will be in its downward position holding auxiliary valve 5, open, then as the fluid enters inlet end C, it will come in forcible contact with main seat disk 6, which if in its'closed position, will be forced upward together with piston body 24, and piston cup 40, thereby permitting the fluid to pass` through the seat opening and through openings 42-.42 into the outlet end chamber 39. 'henever the pressure of the fluid in outlet chamber 39, the annular space 37, and the chamber 35,

the underside of diaphragm 9. causing it to rise and thereby allow the auxiliary valve 45, to close. Then as the high or initial luid pressure from the inletchanibor is still flowing up through large hole 3l; and restrieted hole'32. it will very quickly fill the upper inside end (if cylinder 3, above piston eup 40, with the inlet or initial pressure, which being greater than the reduced or delivery pressure, and piston cup 40, being if' greater arm than main wat disk i2, im; y ter will he 'wreed into Closed In 'non igmimi its seat 4, and piment lfm-tlm iii-M' 0i if.

imi

mail)v ciiwil'ig uid actuated t0n cyiindm,

*alive disk :it Fide :nl ifii'vri if 'jlw wid Vaiv Sleat in ffyiindmz #i pislifm viii) mi" packing ai ih@ Mid nf 'miienf 'mid wiwl pi atom www ii'mn tim win dim` NUL :i Huid passaggi ray having :i Effi puxrifm through iin? imdav of smid mixiputin) wiwfii'v iuid pisfelme from mid inici wimiiiiwi may flow through, und into im 'iwm pm tion of said vzdw pig-tm; viizda-l' :adiui'un t0 said Cup end. :l sp1-ing imidwi dinphmgrm adapted tu dos@ said univr rimmiwwrd im tion of Suid cyliildvi' of :mid nvlimiiw my, abutting means iwiwicn smid lmidvd iinn phiugm und Said swoudzuy wlw. puits www munii'ating from Suid outer ciiummcd pim imi swmui.; :i sifmiiib :ary imm iifiwifgii smi; l minimi! Hmm Mini-vii mii Yulw mii wid lumix 'mgm im* @Mining a suitable fluid passage way With a'restricted port through the body of said seat piston whereby the. high fluid pressure from the said inletchamber will normally close the communicating port between said inletl and said outlet chambers, and means controlled by the reduced delivery pressure for causing said secondary valve to open and thereby equalize the fluid pressure within the cylinder above the piston cup, with the reduced pressure is said outlet chamber.

4. ln a reducing valve having inlet and outlet chambers therein, a dividing wall between said chambers, a communicating port between said inlet and outlet chambers through said dividing wall, in combinationl with valve piston cylinder having a valve seat at one end, and a cylinder cap at the end away from the valve seat. said cylinder being contained and suitably supported within said outlet chamber with the seat end of said cylinder in impervious contact with said dividing wall surrounding the communicating port therein, a secondary valve port through said c vlinder cap, a spring actuated valve slidably mounted and normally closing said secondary valve port. a fiuid pressure chamber on the side of said cylinder cap away from said secondary valve, a spring loaded diaphragm closing said chamber in `said cylinder cap. a stem member of said secondary valve abutting said loaded diaphragm, a port communicating from said chamber in said cylinder cap into the said outlet chamber, a plurality of ports communicating from inside of said valve piston cylinder adjacent to its seatv end into said outlet chamber, and a fluid actuated seat piston within said cylinder, adapted to close or open the communicating port between said inlet and outlet chambers.

In a reducing valve having inlet and outlet chambers. ay dividing wall between said chambers` a conm'iunicating port between the said inlet and outlet chambers through the said dividing wall, the combination of a valve piston cylinder` having a valve seat, said cylinder and valve seat being removably contained within the outlet chamber with the seat portion in impervious contact with the, dividing wall surrounding the communicating port between said inlet and outlet chambers.

G. In a reducing valve havingr inlet and outlet chambers, a dividing wall between said chambers, a communicating port between said chambers through said dividing wall, the combination of a valve piston cylinder having a valve seat. said cylinder and scat being removably contained within the outlet chamber. ay packing or sealing ring of a resilient material interposed and making a fluid tight joint between the seat portion of said cylinder and said dividing wall surrounding said communicating port therein.

7. In a reducing valve having inlet and outlet chambers, a. dividing wall between said chambers, a communicating port between said chambers through said dividing wall, the combination of a laterally extended portion of said outlet chamber adapted to receive and hold firmly a removable piston cylinder having a valveseat thereon, said valve seat being held in impervious connection with said dividing wall surrounding the communicating port therein between the inlet and outlet chambers, a piston operated valve within said cylinder, means for controlling said piston operated valve together with means for holding said valve piston cylinder within said laterally extended portion of the outlet chamber with the valve seat end of said valve piston cylinder in fluid tight contact with said communicating port through said dividing wall.

8. In a reducing valve a body casing having inlet and outlet chambers therein, a dividing wall between said chambers, a communicating port between said inlet and Said outlet chambers through said dividing wall, in combination with a valve piston cylinder having a valve seat, said cylinder being contained, and suitably supported within said outlet chamber, with the valve seat portion of said cylinder surrounding the communieating port and held in impervious contact with said dividing wall. a plurality of ports through the wall of cylinder near its seat portion, said plurality of ports communicating with the said outlet chambers, a piston cap adapted to close the end of the valve piston cylinder opposite its seat end, a secondary valve port through said cylinder cap, a slidably mounted spring actuated valve adapted to normally close said secondary valve port, a fluid actuated valve piston within Said cylinder. said valve piston having a valve disk at its end adjacent, and adapted to imperviously close against the seat in said cylinder. a iuid tight piston cup or packing on end of said piston opposite its seat end, and a suitable fluid port through the body of said valve piston, whereby the initial fluid pressure from the said inlet chamber is conveyed to the upper side of said fluid tight piston cup within said valve piston cylinder, together with means for holding said valve piston cylinder within said outer chamber, and also means for operating and controlling said valve piston and valve seat disk, whereby the flow of fluid through said port in said dividing wall is controlled hy the fluidA pressure Within said outlet chamber.

9. In a reducing valve, the combination of a body casinghaving inlet and outlet chambers, an integral dividing wall between said chambers, a communicating port through said dividing wall. a valve piston cylindc adapted to be held in fixed impervious ce tact with Said dividing Wall surrounding said communicating port, a vulve sont in said valve, piston cylinder, u valve disk, adapted to impervionsly clobion Said valve, sent. together with innns for opt'rnting Said valve disk through the medium of the llnid pressure within said outlet Plininbor of Suid body Qnsng'.

Vl0. 1n n rwlncing vnlvv, 11 body casing having inlvt and outlet clnln'ilwrs, :in inte-- grail di\ idingr will between :said irhambers,n communicating port through Snid dividing wall, in combination with a1 removable vulve seat adopted to he lixedly held in impervious vontnct with smid dividing wall Surrounding Said communicating port, a valve piston cylinder connected to and supporting said removable valve. Sent, Said vulve piston cylinder adapted to hold and guide a, piston actuated vaive disk in impervious Contact with smid valve wat, communicating ports from said piston cylinder into said outlet chamber, a mp on the end of said vulve piston Qvlindir away from its Sent end, n secondary valve sont in Suid Cap, a secondA :iry vnlvv to nose Suid Secondary valve sent, a clnnnlwrvd portion on outer portion. of said cylindsr cap, a diaphragm adapted to ciose smid ullzilnlwrod portion in Smid cylinder wip, und means for holding' Said diaphragm, said cylinder cap, Suid cylinder, and Said removable valve` sent. in fluid tight Contact with said valve body casing und with Said dividing wail With Said casing between the inlet and outlet portion thereof,

ARTHUR lV. CASH. VVitnessos:

Roy MUORE, ELMER F. LEMMON. 

